133332221 has 8 divisors (see below), whose sum is σ = 146894688. Its totient is φ = 120010000.

The previous prime is 133332217. The next prime is 133332229. The reversal of 133332221 is 122233331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133332221 - 2² = 133332217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133332193 and 133332202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133332229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58895 + ... + 61116.

It is an arithmetic number, because the mean of its divisors is an integer number (18361836).

Almost surely, 2^133332221 is an apocalyptic number.

133332221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133332221 is a deficient number, since it is larger than the sum of its proper divisors (13562467).

133332221 is a wasteful number, since it uses less digits than its factorization.

133332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120123.

The product of its digits is 648, while the sum is 20.

The square root of 133332221 is about 11546.9572182459. The cubic root of 133332221 is about 510.8715342725.

Adding to 133332221 its reverse (122233331), we get a palindrome (255565552).

The spelling of 133332221 in words is "one hundred thirty-three million, three hundred thirty-two thousand, two hundred twenty-one".